CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022	Dec. 31, 2021
Comprehensive income (loss)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 207	$ 106	$ 460	$ 303	$ 521
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	120	(5)	142	16
Net unrealized investment gains (losses)	(486)	(3,539)	617	(7,328)
OCI, Liability for Future Policy Benefit, Gain (Loss), after Reclassification Adjustment and Tax, Parent	426	2,917	(295)	6,331
OCI, Market Risk Benefit, Instrument-Specific Credit Risk, Gain (Loss), after Adjustments and Tax, Parent	(1)	2	0	(2)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, after Tax	4	(1)	9	(1)
Total other comprehensive income (loss), net of tax			473	(984)	$ (1,371)	$ 409
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	270	(520)	933	(681)
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest	2	1	3	1
Total comprehensive income (loss) attributable to RGA, Inc.	$ 268	$ (521)	$ 930	$ (682)